Casing for telephone sets



J. S., TIMMONS.

CASING FOR TELEPHONE SETS.

APPLICATION FILED MAY 3. I9I9.

Patented Apr. 18, 1922..

2 SHEETS-SHEET 1.

J. S. TIMMONS.

CASING FOR TELEPHONE SETS.

APPLICATION FILED MAY 3. 1919.

1,412,982. Patented Apr. 18, 1922.

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JOHN s. TIMMONS, or new roan, Y., ASSIGNQR, BY Mnsnn ASSIGNMENTS, TO

mrnnna'rronen CALLOPI-IONE oonronarron, A conroaa'rron or DELA- WARE.

CASING FOR TELEPHONE SETS.

. Patented Apr. 18, 1922.

- Application filed. May 3, 1919. Serial No. 294,441.

To all whom it may concern. I

.Be it known that 1, JOHN b. EIMMoNs, a

citizen of the United States, and a resident Sets, set forth in the following specification.

This invention relates to telephone sets, particularly of the type in which the various operating parts of the set are enclosed in a water-tight casing. A structure of this type very commonly must be exposed to the elements, as it is many times employed on shlpboard in an exposed position. A casing suitable to withstand the action of the elements and sea-water is of considerable expense. It is an object of this invention to minimize the expense of such casings by making possible the employment of a standard size and type of casing for all of a various number'of circuits and switches. In this type of telephone, selective calling of any one of various stations is an incident and requires the installation upon each set of a number of switches, the number varying according to the number of stations under the control of each. individual instrument. In furthering the general object of the invention the relativelocatio'n ofthe transmitter and the receiver and their mounting on the casing is such as to aid the inventive object of minimizing the size of the casing required and the facility of examination of the operating parts. It is further an objective feature in the positioning of the transmitter and receiver to provide, in a casing of minimum size to accommodate all the apparatus to be enclosed, a maximum sized window opening to be covered by any one of a number of interchangeable switch-carrying panels, the size of the panel accommodated being such as to mount the maximum number of switches desired for a set of this type and also to mount the minimum number of switches and to provide a ready means in which a set, built up with any one of a various number of controlling switches, may be constructed at minimum expense.

A further object of this invention is to improve the manner in which a casing accommodating a transmitter and a receiver, which operatively open outwardly, maybe hermetically enclosed, and their outwardly opening interiors selfdrained, while, at the Same time,'the various parts of the apparatus are made readily accessible by the outwardly swinging door.

Further objects of this invention are to improve in general the enclosing and mounting casing of a telephone set of this general type and will be better understood by reference to the illustrative embodiment of the invention described in the following specification which has reference to the accompanying drawings which form a part hereof, in which like characters designate corresponding parts 111 the several figures and in which i F 1- is a staggered longitudinal central section through the complete set, with parts broken away, and with the panel elevated;

Fig. 2 is a front or face view of the set with the panel removed;

Fig. 3 is a similar view of a panel carrying three switches; and

Fig. l is a detail of the manner in which a panel is secured in position.

The casing proper A comprises preferably an elongated, substantially rectangular, boxlike casing, preferably of bronze, the base 1 of which is formed integrally with mounting lugs-2 and the ends 3 and 4: of which are preferably rounded off into semi-cylindrical form. The end 45 is provided with a threaded conduit opening 5 leading through an enlargement 6 in the wall 4-. Hinged to the casing A in a suitable manneras by hinges 7 IS a cover portion 8 having a right-angular flange 9 adaptedito seat upon the resilient gasket 10. suitably formed from rubber or any suitable sealing material and mounted in a continuous trough 11 in the face rim of the casing A. Lugs 12 are preferably formed both on the cover 8 and the rim 1 of the casing A to cooperate with threaded clamping bolts 14:, serving to force the rim 9 of the cover 8 against the gasket 10 to complete a seal between the cover 8 and the casing A.

A transmitter casingB is mounted within the casing A beneath a circular opening 20 in the cover .8 and is removably sealed against thecover 8 by a gasket 21 against which the casing Bis forcibly drawn by a mouth-piece and cover 22 having perforations a and a flange 23 gripping the outer face of the cover 8 and a threaded inner extension 24% leading into the casing B. The diaphragm b has a packing gasket 0 clamped against the shoulder d by the threadedjam ring whereby the interior of the case B is hermetically sealed. The space f beyond the diaphragm 7) is seltdraiuing through the perforations a in the protective cover 22. Electrical connections to the transmitter within the casing B are provided through the casing by means of the usual insulated binding posts 25 adapted to cooperate with lead wires 26, which are suitably anchored to the under side of the cover 8,'and extend along the cover to the receiver G and downwardly to a terminal. board The terminal board D is mounted suitably upon and preferably spaced above the base 1 of the casing A as by spacers 27 and screws 28.

"This board D is serviceable in carrying a numl'ienot terminal clips such as the two series 30 and 31, and. serves to mount any of the usual apparatus in telephone sets such.

7 as may be enclosed within thev hood 3 2, as

tion to beconnected with the terminal clips 30hr 30 and 31, as may be desired.

Longitudinally spaced from the transmitter casing l3 is a receiver casing or horn E which is preferably formed,.at least in part, integrally with the cover 8. llnthe structure'shown a mouth covering 40 having perforations 9 covers the opening of the horn E and may be secured in place in-any suitable manner.. The space ZL- within shell E isself draining through the perforations g, the outer row of perforations fproviding drainage openings at thelowest point of the cavity h when the; casingis'mounted for operation vertically on a wall. In ithe emf bodiment illustrated the bolt 60, preferably formed integrallywith or at least secured to themou'th covering 410, extends through the horn. Eand serves to draw the covertO into positionthrough the medium o'f a nut 51, theopening for said bolt being sealed by the n'utfil with the aid 01": a packingwasher 62, itdesired The, receiver structure describedin detail in my copending application for a telephone ,receiver, la] No. 2 ,386, filed July 11 1918,, enters the side of the horn, its nipple-[63 havingnserew aded enga ement therewith, which I is il ise a -i rrnetically closed connection, Between the receiver C, which cooperates with the horn. vPhand the covenS may be meuntedthe condenser 41-, these parts (the condenser A51; and the receiver C) being well accommodated in the semi-circular end 3 e ri h l asingA. It S oul be, n t d particula v how t p o rd D; and ts a sociated parts are located in, the casing space between the casings B and E rather than under them, thereby minimizing the depth betweencoverand base of the casing.

1n the cover between the transmitter and receiver openings 220 and 400 is provided a window F, preferably of a width equalling hetotal width 01% the casing and in its other dimension approximating the distance between thetransmitter and receiver openings 220 and 400. p

The parts of the structure so far described maybe standard and unvarying, regardless of the number of stations that a finished set is to control. In order cheaply to provide -for avarying number of control switches; a panel G is provided having an outwardly projecting marginal bead at offset from the plane of the panel and. preferably having screw tapped lugs 15 integral therewithflto accommodate machine screws 4-.6 projecting outwardly through suitable perforations in the cover 8, it being understood that, in ad dition to its attachment by the machine screws 4-6, the panel may be soldered or brazed to the cover, as indicated by the SOlClGlflT in 4, which shows the details ofthe panel mounting. This panel may carry one or more up to a predetermined number of switches 48, projecting inwardly through the panel. In the drawings three switches are shown, the inwardly projecting parts being indicated collectively by the numeral 49, but the structure of which for the most part is obscured by the unbroken wall portion :30 of the side of the cover and casing, because the details of these switches are not intended to be a part of this invention. it should, however, be noted that the switches of necessity have inwardly project ing parts which must have space within the casing A for their accommodation between thetransmitter casing 13 and the receiver casing E, 51 is a number or indication strip which may be mounted on the panel G in any suitable manner, as'by screws 52, to

between; a terminal board mounted within X said casing intlie space between said transm tter and rece ver; sald cover having a window between said transmltter. and receiver;

dby"

at i d i y 'hsran i th ze r as said window for coverin'g said window, whereby various numbers of switches on a ima es panel may be mounted as a unit in said. window in position to cooperate with said terminal board so that said casing may accommodate various numbers of circuits without material. alteration of the structure.

2. A telephone set comprising a substantially rectangular casing closed on five sides; an openable and closable cover for the sixth side of said casing; a receiver and a transmitter respectively fixed to and carried by said cover at opposite ends thereof and 0peratively opening outwardly therefrom and leaving a space of a length approximately at least half the width of said casing therebetween; a terminal board mounted within said casing between said transmitter and receiver; said cover having a window between said transmitter and receiver; and a switch carrying panel of the same size as said window to fit said window and having parts projecting into said casing between said transmitter and receiver which are arranged transversely to said cover whereby a standard panel carrying various numbers of in wardly projecting parts may be associated with said cover without alteration of said casing or cover.

3. In water-proofed telephone apparatus. a box-like casing having an openable and closable cover provided with a transmitter opening and a receiver opening and a watertight seat between said casing and cover; a transmitter-casing removably carried by said cover and adapted to form a water-tight seal about said transmitter-opening; and a receivenhorn structure covering said receiver opening and comprising an outwardly opening inwardly closed shell of truncated conical shape making a water-tight closure with said cover.

4. In water-proofed telephone apparatus, a boX-like casing having an openablc and closable cover provided with a transmitter opening and a receiver opening and a watertight seat between said casing and cover; a transmitter-casing removably carried by said cover and adapted to form a water-tight seal about said transmittenopening; a receiverhorn structure covering said receiver opening and comprising an outwardly opening inwardly closed shell of truncated conical shape making a water-tight closure with said cover and having a protective covering for said opening with a bolt passing inwardly through the bottom of said shell to clamp the structure in place.

5. A telephone casing for exposed service having a hinged cover provided with an integral inwardly projecting shell of substantially truncated conical shape to form part of a receiver-horn and extending inwardly for substantially the full depth of said cas ing; in combination with a receiver mounted on the side of the smaller end of said trunr JOHN S.- TIHMONS. 

